Bulk plant theory and operations Flashcards
Which delivery principle is the air bulk material ratio constant throughout the line?
Steady dense flow
What is the purpose of bulk plant operation?
To allow moving of bulk materials
To provide opportunity for bulk storage at district and location.
To allow for dry blending
What affects the amount of material carried by the air?
Amount of air
Size and weight of the particles
size and length of piping between tanks
pressure in holding tank and receiving tank.
What is the bulk advantages over sacks?
Higher transfer rate
Reduced man power requirements for material transfer
minimal loss of material.
what are the 2 principles of flow delivery?
Plug Flow
Steady dense flow
What are the three types of air compressor?
Reciprocating
Vane type
Rotary Axial
What are the basic parts of a bulk system?
Dust control (up)
Pressure Bessel (tall)
Weight batch blender (cone)
Additive bottle (bellow the dust control)
Moisture control system (before compressor)
Pipping
Compressor
three types of moisture control system?
Water separator (slow down) Air dryer (by absorption) After cooler (compressor discharge)
what are the 2 types of dust control device filters?
Cloth sock filter (cloth material)
Pleated paper cartridge (cartridge)
What is the minimum amount required of cement as a sample?
25 lb and kept for 30 days or the end of the well.
what is the bulk load factor?
the ratio between the actual material loaded into a silo and the absolute volume of that silo.
Put the bulk loading calculations steps into correct order:
- Calculate the maximum number of sacks that will fit into each piece of equipment.
- Determine the total amount of materials needed.
- Calculate the number of batches, the number of sacks per batch, and the amount of materials per batch.
- Determine the batch size according to the capacity of the equipment used.
- Adjust the blend size to fit the truck tanks and truck weight limitations.
- Check existing inventory to be sure adequate amounts of all required materials are available at the time of blending.
- Determine the total amount of materials needed.
- Check existing inventory to be sure adequate amounts of all required materials are available at the time of blending.
- Determine the batch size according to the capacity of the equipment used.
- Calculate the maximum number of sacks that will fit into each piece of equipment.
- Adjust the blend size to fit the truck tanks and truck weight limitations.
- Calculate the number of batches, the number of sacks per batch, and the amount of materials per batch.
What should you use on bulk silos?
Suction or discharge hoses?
Discharge hoses
Which of the following may be used on piping of silos? standard caps or blanking caps?
blanking caps
Which of the following are guidelines of STD 15 and 25
- Tank must be full
- The entrance of tank must not be blocked
- Workers must wear all EPP
- Tank mus be empty
- A buddy system should always be used.
- The entrance of tank must not be blocked
- Workers must wear all EPP
- Tank mus be empty
- A buddy system should always be used.
According to Tech Directive 4-2, the WBB should not be loaded with more than ____% of its absolute volume to avoid losses of materials through the vent line.
75%
As compressed air flows though bulk material, it tends to compact the particles.
false
The amount of material carried by air depends on which of the following factors?
B. amount of compressed air
D. pressure inside the holding tank
E. size of piping between tanks
F. pressure inside the receiving tank
When conveying bulk material using unsteady dense plug flow, the delivery rate is controlled at the discharge end of the transport line.
false
Which of the following is true about the fill line on a pressure tank?
The opening of the line will be at the bottom of the tank.
On most Schlumberger pressure tanks, the pressure relief valves are designed to relieve at what pressure?
35 psi
The porous media used as aeration devices in pressure tanks are commonly made of high-density plastic.
false is made of canvas (lienzo)
Which aspects of coded pressure vessel construction does the ASME govern?
B. type of metal used for construction
C. welding procedures
D. testing procedures
E. use of approved welders and inspectors
Match each pressure vessel component with its description.
component
___ A.discharge line
___ B. pop-off
___ C. rupture disk
___ D. pipe jets
___ E. vacuum breaker
Description
1. an additional safety device
2. primary pressure relief safety device
3. starts as a hole in the middle-bottom of the tank
4. enables compressed air to aerate through cement
5. pressure system and additional safety device
3 A.discharge line 2 B. pop-off 1 C. rupture disk 4 D. pipe jets 5 E. vacuum breaker
Which of the following statements are true for both surge cans and gravity silos? Select three correct answers. A. They separate bulk material transport from bulk material supply metering. B. They allow air used to transport bulk material to escape. C. They provide a buffer when switching from one P-tank to another. D. They can be used as storage tanks for bulk material on location. E. They are considered code tanks.
A. They separate bulk material transport from bulk material supply metering. B. They allow air used to transport bulk material to escape. C. They provide a buffer when switching from one P-tank to another. D. They can be used as storage tanks for bulk material on location.
The pressurized surge cans used by Schlumberger are equipped with a side
discharge.
true
Which of the following components on a reciprocating compressor is responsible for maintaining the desired pressure?
unloader
How is the ft3/min discharge of a rotary axial compressor regulated?
by throttling the intake valve
Match each type of compressor with its principle of operation. Type A. reciprocating B. rotary axial C. vane type
Principle of operation
- Air is forced into a smaller diameter on the discharge end.
- It acts like a blower.
- It works like a two-cycle engine.
reciprocating
It works like a two-cycle engine.
rotary axial
Air is forced into a smaller diameter on the discharge end.
vane type
It acts like a blower.
Which of the following is risked by having a dirty air filter on a reciprocating compressor?
Oil could be carried to the pads in the bulk cement tank
Match each moisture removal device with its principle of operation. Device A. after-cooler B. dryer C. water separator D. inline water separator Principle of operation 1. desiccant cartridge 2. centrifugal force 3. condensation through thermal change 4. slows air down
A. after-cooler
3. condensation through thermal change
B. dryer
1. desiccant cartridge
C. water separator
4. slows air down
D. inline water separator
2. centrifugal force
What is the rule-of-thumb amount of lubricant that a lubricator should add to compressed air?
C. 4 to 6 drops per minute
National regulations are the most important regulations in the design of Schlumberger dust control devices.
true
Pleated paper cartridge dust collectors are built with a bypass mechanism that provides overpressure protection
true
The use of the additive hopper eliminates the use of _________.
additive bottle
A pressure vacuum system has the following two advantages:
A. Less dust is generated.
B. Cleaning is easier than for bulk tanks.
C. Costs are lower.
D. No code is needed.
All storage tanks on the inlet side of the WBB require a full _________ vent on top of the tank for each individual product being stored, and a 2-in _________ on the tank.
A. open
B. closed
C. valve
D. vacuum breaker
All storage tanks on the inlet side of the WBB require a full open vent on top of the tank for each individual product being stored, and a 2-in vacuum braker on the tank.
The vacuum pressure plants use
_________ pumps:
The vacuum pressure plants use
2 pumps:
The WBB is also used as a _________ to blend and move material.
P-tank
